/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.carbondata.core.carbon.datastore.chunk.reader;

import org.apache.carbondata.core.carbon.datastore.chunk.DimensionColumnDataChunk;
import org.apache.carbondata.core.datastorage.store.FileHolder;

/**
 * Interface for reading the data chunk
 * Its concrete implementation can be used to read the chunk.
 * compressed or uncompressed chunk
 */
public interface DimensionColumnChunkReader {

  /**
   * Below method will be used to read the chunk based on block indexes
   *
   * @param fileReader   file reader to read the blocks from file
   * @param blockIndexes blocks to be read
   * @return dimension column chunks
   */
  DimensionColumnDataChunk[] readDimensionChunks(FileHolder fileReader, int... blockIndexes);

  /**
   * Below method will be used to read the chunk based on block index
   *
   * @param fileReader file reader to read the blocks from file
   * @param blockIndex block to be read
   * @return dimension column chunk
   */
  DimensionColumnDataChunk readDimensionChunk(FileHolder fileReader, int blockIndex);
}
